QUESTIONS AND ANSWERS 139 



State the functions of the sensitive laminae or podophyllous tissue. 



It is the seat of tactile sense, secretes horny lamelte and the 

 horny laminEe to cover the pedal bone, thus providing support for 

 the body weight. 

 Define physiologic shoeing. 



Shoeing of the normal, or healthy foot, as contrasted with the 

 special shoeing necessary when pathological conditions exist. It 

 comprises the proper paring of the foot and careful adjustment of 

 the shoe so that the bearing surface is the same as in the unshod 

 foot, or in other words, as nature intended. 



Generation and Development 

 State the function of the testicle. 



The production of semen, especially the generative element of 

 the same, viz., spermatozoa. 

 Describe fully the development and maturation of a Graafian follicle. 

 The germinal epithelium covering the ovary grows into the body 

 of the latter as a long cylinder of cells. These cells become cut off 

 from any connection with the outside, and one cell (occasionally 

 two) takes on the appearance of an ovum and the remaining cells 

 become the membrana granulosa, enclosing it. A connective-tissue 

 capsule, the tunica fibrosa, forms around this structure, and between 

 it and the membrana granulosa a fluid, the liquor folliculi, appears. 

 This whole structure continues to grow and approach the surface 

 where it remains until ovulation occurs. 



Describe the placenta and state its function. 



The placenta is a membranous structure within the uterus which 

 establishes communication between the mother and foetus by means 

 of the umbilical cord. In the mare, it is diffuse, i.e., the villi which 

 intimately unite the chorion and uterus are scattered over the whole 

 surface of the chorion. In the cow, the placenta is cotyledonary, 

 i.e., the villi are gathered into ttifts upon the surface of the chorion, 

 and these tufts correspond to elevations of the mucous membrane 

 of the uterus. In the dog and cat, the villi are arranged in a band- 

 like manner over the chorion with a considerable space on either 

 side free from villi. This form of placenta is called "zonary." 



Describe the decidua vera of the cat and state its function. 



Zonary type (see preceding answer). It establishes communi- 

 cation between the mother and foetus through the umbilical cord. 



Give the source and character of uterine milk. ' 



This fluid is secreted by the uterine glands and lies between the 

 \'illi of the chorion and the uterine mucous membrane. It is of a 



